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Date of Publication:2022-10-10

Journal:水利学报

Issue:4

Page Number:506-512

ISSN No.:0559-9350

Abstract:The governing equations of liquefaction of embankment were established based on u-p formulation of Blot's two-phase mixture theory, and a cyclic elastic constitutive model and improved Lagrange large-deformation method were jointly adopted to take both physical and geometrical nonlinearities into account. The shape functions were established by moving least square method. On this basis, the Galerkin method was used to discretize the governing equations and establish the basis function equations of the element-free Galerkin method. The meshless method can avoid the volumetric locking due to large deformation which usually occurred to numerical computations using finite element method. The proposed method was applied to analyze the seismic response of an embankment with height 4.8 m. The comparison with the result of finite element method shows that the acceleration at the top of embankment is amplified but it will be reduces sharply after the occurrence of liquefaction, at the same time the vibration periods will be lengthened. Other than the besides regions, the foundation of the embankment and the soil at the dam toe are not easy to be liquefied.

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